3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
15 * Awake! Awake! Fear, Fire, Foes! Awake!
19 /* This file contains 'hot' pp ("push/pop") functions that
20 * execute the opcodes that make up a perl program. A typical pp function
21 * expects to find its arguments on the stack, and usually pushes its
22 * results onto the stack, hence the 'pp' terminology. Each OP structure
23 * contains a pointer to the relevant pp_foo() function.
25 * By 'hot', we mean common ops whose execution speed is critical.
26 * By gathering them together into a single file, we encourage
27 * CPU cache hits on hot code. Also it could be taken as a warning not to
28 * change any code in this file unless you're sure it won't affect
33 #define PERL_IN_PP_HOT_C
42 if ( PL_op->op_flags & OPf_SPECIAL )
43 /* This is a const op added to hold the hints hash for
44 pp_entereval. The hash can be modified by the code
45 being eval'ed, so we return a copy instead. */
46 XPUSHs(sv_2mortal((SV*)Perl_hv_copy_hints_hv(aTHX_ (HV*)cSVOP_sv)));
56 PL_curcop = (COP*)PL_op;
57 TAINT_NOT; /* Each statement is presumed innocent */
58 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
68 if (PL_op->op_private & OPpLVAL_INTRO)
69 PUSHs(save_scalar(cGVOP_gv));
71 PUSHs(GvSVn(cGVOP_gv));
84 PL_curcop = (COP*)PL_op;
91 PUSHMARK(PL_stack_sp);
106 XPUSHs((SV*)cGVOP_gv);
116 if (PL_op->op_type == OP_AND)
118 RETURNOP(cLOGOP->op_other);
124 dVAR; dSP; dPOPTOPssrl;
126 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
127 SV * const temp = left;
128 left = right; right = temp;
130 if (PL_tainting && PL_tainted && !SvTAINTED(left))
132 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
133 SV * const cv = SvRV(left);
134 const U32 cv_type = SvTYPE(cv);
135 const U32 gv_type = SvTYPE(right);
136 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
142 /* Can do the optimisation if right (LVALUE) is not a typeglob,
143 left (RVALUE) is a reference to something, and we're in void
145 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
146 /* Is the target symbol table currently empty? */
147 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
148 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
149 /* Good. Create a new proxy constant subroutine in the target.
150 The gv becomes a(nother) reference to the constant. */
151 SV *const value = SvRV(cv);
153 SvUPGRADE((SV *)gv, SVt_IV);
154 SvPCS_IMPORTED_on(gv);
156 SvREFCNT_inc_simple_void(value);
162 /* Need to fix things up. */
163 if (gv_type != SVt_PVGV) {
164 /* Need to fix GV. */
165 right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
169 /* We've been returned a constant rather than a full subroutine,
170 but they expect a subroutine reference to apply. */
173 SvREFCNT_inc_void(SvRV(cv));
174 /* newCONSTSUB takes a reference count on the passed in SV
175 from us. We set the name to NULL, otherwise we get into
176 all sorts of fun as the reference to our new sub is
177 donated to the GV that we're about to assign to.
179 SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
184 /* What can happen for the corner case *{"BONK"} = \&{"BONK"};
186 First: ops for \&{"BONK"}; return us the constant in the
188 Second: ops for *{"BONK"} cause that symbol table entry
189 (and our reference to it) to be upgraded from RV
191 Thirdly: We get here. cv is actually PVGV now, and its
192 GvCV() is actually the subroutine we're looking for
194 So change the reference so that it points to the subroutine
195 of that typeglob, as that's what they were after all along.
197 GV *const upgraded = (GV *) cv;
198 CV *const source = GvCV(upgraded);
201 assert(CvFLAGS(source) & CVf_CONST);
203 SvREFCNT_inc_void(source);
204 SvREFCNT_dec(upgraded);
205 SvRV_set(left, (SV *)source);
210 SvSetMagicSV(right, left);
219 RETURNOP(cLOGOP->op_other);
221 RETURNOP(cLOGOP->op_next);
228 TAINT_NOT; /* Each statement is presumed innocent */
229 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
231 oldsave = PL_scopestack[PL_scopestack_ix - 1];
232 LEAVE_SCOPE(oldsave);
238 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
243 const char *rpv = NULL;
245 bool rcopied = FALSE;
247 if (TARG == right && right != left) {
248 /* mg_get(right) may happen here ... */
249 rpv = SvPV_const(right, rlen);
250 rbyte = !DO_UTF8(right);
251 right = sv_2mortal(newSVpvn(rpv, rlen));
252 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
258 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
259 lbyte = !DO_UTF8(left);
260 sv_setpvn(TARG, lpv, llen);
266 else { /* TARG == left */
268 SvGETMAGIC(left); /* or mg_get(left) may happen here */
270 if (left == right && ckWARN(WARN_UNINITIALIZED))
271 report_uninit(right);
272 sv_setpvn(left, "", 0);
274 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
275 lbyte = !DO_UTF8(left);
280 /* or mg_get(right) may happen here */
282 rpv = SvPV_const(right, rlen);
283 rbyte = !DO_UTF8(right);
285 if (lbyte != rbyte) {
287 sv_utf8_upgrade_nomg(TARG);
290 right = sv_2mortal(newSVpvn(rpv, rlen));
291 sv_utf8_upgrade_nomg(right);
292 rpv = SvPV_const(right, rlen);
295 sv_catpvn_nomg(TARG, rpv, rlen);
306 if (PL_op->op_flags & OPf_MOD) {
307 if (PL_op->op_private & OPpLVAL_INTRO)
308 if (!(PL_op->op_private & OPpPAD_STATE))
309 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
310 if (PL_op->op_private & OPpDEREF) {
312 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
322 tryAMAGICunTARGET(iter, 0);
323 PL_last_in_gv = (GV*)(*PL_stack_sp--);
324 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
325 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
326 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
329 XPUSHs((SV*)PL_last_in_gv);
332 PL_last_in_gv = (GV*)(*PL_stack_sp--);
335 return do_readline();
340 dVAR; dSP; tryAMAGICbinSET(eq,0);
341 #ifndef NV_PRESERVES_UV
342 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
344 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
348 #ifdef PERL_PRESERVE_IVUV
351 /* Unless the left argument is integer in range we are going
352 to have to use NV maths. Hence only attempt to coerce the
353 right argument if we know the left is integer. */
356 const bool auvok = SvUOK(TOPm1s);
357 const bool buvok = SvUOK(TOPs);
359 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
360 /* Casting IV to UV before comparison isn't going to matter
361 on 2s complement. On 1s complement or sign&magnitude
362 (if we have any of them) it could to make negative zero
363 differ from normal zero. As I understand it. (Need to
364 check - is negative zero implementation defined behaviour
366 const UV buv = SvUVX(POPs);
367 const UV auv = SvUVX(TOPs);
369 SETs(boolSV(auv == buv));
372 { /* ## Mixed IV,UV ## */
376 /* == is commutative so doesn't matter which is left or right */
378 /* top of stack (b) is the iv */
387 /* As uv is a UV, it's >0, so it cannot be == */
390 /* we know iv is >= 0 */
391 SETs(boolSV((UV)iv == SvUVX(uvp)));
398 #if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
400 if (Perl_isnan(left) || Perl_isnan(right))
402 SETs(boolSV(left == right));
405 SETs(boolSV(TOPn == value));
414 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
415 DIE(aTHX_ PL_no_modify);
416 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
417 && SvIVX(TOPs) != IV_MAX)
419 SvIV_set(TOPs, SvIVX(TOPs) + 1);
420 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
422 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
434 if (PL_op->op_type == OP_OR)
436 RETURNOP(cLOGOP->op_other);
445 const int op_type = PL_op->op_type;
446 const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
450 if (!sv || !SvANY(sv)) {
451 if (op_type == OP_DOR)
453 RETURNOP(cLOGOP->op_other);
459 if (!sv || !SvANY(sv))
464 switch (SvTYPE(sv)) {
466 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
470 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
474 if (CvROOT(sv) || CvXSUB(sv))
487 if(op_type == OP_DOR)
489 RETURNOP(cLOGOP->op_other);
491 /* assuming OP_DEFINED */
499 dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr;
500 tryAMAGICbin(add,opASSIGN);
501 svl = sv_2num(TOPm1s);
503 useleft = USE_LEFT(svl);
504 #ifdef PERL_PRESERVE_IVUV
505 /* We must see if we can perform the addition with integers if possible,
506 as the integer code detects overflow while the NV code doesn't.
507 If either argument hasn't had a numeric conversion yet attempt to get
508 the IV. It's important to do this now, rather than just assuming that
509 it's not IOK as a PV of "9223372036854775806" may not take well to NV
510 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
511 integer in case the second argument is IV=9223372036854775806
512 We can (now) rely on sv_2iv to do the right thing, only setting the
513 public IOK flag if the value in the NV (or PV) slot is truly integer.
515 A side effect is that this also aggressively prefers integer maths over
516 fp maths for integer values.
518 How to detect overflow?
520 C 99 section 6.2.6.1 says
522 The range of nonnegative values of a signed integer type is a subrange
523 of the corresponding unsigned integer type, and the representation of
524 the same value in each type is the same. A computation involving
525 unsigned operands can never overflow, because a result that cannot be
526 represented by the resulting unsigned integer type is reduced modulo
527 the number that is one greater than the largest value that can be
528 represented by the resulting type.
532 which I read as "unsigned ints wrap."
534 signed integer overflow seems to be classed as "exception condition"
536 If an exceptional condition occurs during the evaluation of an
537 expression (that is, if the result is not mathematically defined or not
538 in the range of representable values for its type), the behavior is
541 (6.5, the 5th paragraph)
543 I had assumed that on 2s complement machines signed arithmetic would
544 wrap, hence coded pp_add and pp_subtract on the assumption that
545 everything perl builds on would be happy. After much wailing and
546 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
547 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
548 unsigned code below is actually shorter than the old code. :-)
553 /* Unless the left argument is integer in range we are going to have to
554 use NV maths. Hence only attempt to coerce the right argument if
555 we know the left is integer. */
563 /* left operand is undef, treat as zero. + 0 is identity,
564 Could SETi or SETu right now, but space optimise by not adding
565 lots of code to speed up what is probably a rarish case. */
567 /* Left operand is defined, so is it IV? */
570 if ((auvok = SvUOK(svl)))
573 register const IV aiv = SvIVX(svl);
576 auvok = 1; /* Now acting as a sign flag. */
577 } else { /* 2s complement assumption for IV_MIN */
585 bool result_good = 0;
588 bool buvok = SvUOK(svr);
593 register const IV biv = SvIVX(svr);
600 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
601 else "IV" now, independent of how it came in.
602 if a, b represents positive, A, B negative, a maps to -A etc
607 all UV maths. negate result if A negative.
608 add if signs same, subtract if signs differ. */
614 /* Must get smaller */
620 /* result really should be -(auv-buv). as its negation
621 of true value, need to swap our result flag */
638 if (result <= (UV)IV_MIN)
641 /* result valid, but out of range for IV. */
646 } /* Overflow, drop through to NVs. */
651 NV value = SvNV(svr);
654 /* left operand is undef, treat as zero. + 0.0 is identity. */
658 SETn( value + SvNV(svl) );
666 AV * const av = PL_op->op_flags & OPf_SPECIAL ?
667 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
668 const U32 lval = PL_op->op_flags & OPf_MOD;
669 SV** const svp = av_fetch(av, PL_op->op_private, lval);
670 SV *sv = (svp ? *svp : &PL_sv_undef);
672 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
673 sv = sv_mortalcopy(sv);
680 dVAR; dSP; dMARK; dTARGET;
682 do_join(TARG, *MARK, MARK, SP);
693 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
694 * will be enough to hold an OP*.
696 SV* const sv = sv_newmortal();
697 sv_upgrade(sv, SVt_PVLV);
699 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
707 /* Oversized hot code. */
711 dVAR; dSP; dMARK; dORIGMARK;
715 GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
717 if (gv && (io = GvIO(gv))
718 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
721 if (MARK == ORIGMARK) {
722 /* If using default handle then we need to make space to
723 * pass object as 1st arg, so move other args up ...
727 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
731 *MARK = SvTIED_obj((SV*)io, mg);
734 call_method("PRINT", G_SCALAR);
742 if (!(io = GvIO(gv))) {
743 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
744 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
746 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
747 report_evil_fh(gv, io, PL_op->op_type);
748 SETERRNO(EBADF,RMS_IFI);
751 else if (!(fp = IoOFP(io))) {
752 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
754 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
755 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
756 report_evil_fh(gv, io, PL_op->op_type);
758 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
763 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
765 if (!do_print(*MARK, fp))
769 if (!do_print(PL_ofs_sv, fp)) { /* $, */
778 if (!do_print(*MARK, fp))
786 if (PL_op->op_type == OP_SAY) {
787 if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
790 else if (PL_ors_sv && SvOK(PL_ors_sv))
791 if (!do_print(PL_ors_sv, fp)) /* $\ */
794 if (IoFLAGS(io) & IOf_FLUSH)
795 if (PerlIO_flush(fp) == EOF)
805 XPUSHs(&PL_sv_undef);
812 const I32 gimme = GIMME_V;
813 static const char return_array_to_lvalue_scalar[] = "Can't return array to lvalue scalar context";
814 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
815 static const char an_array[] = "an ARRAY";
816 static const char a_hash[] = "a HASH";
817 const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV;
818 const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
822 tryAMAGICunDEREF_var(is_pp_rv2av ? to_av_amg : to_hv_amg);
825 if (SvTYPE(sv) != type)
826 DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
827 if (PL_op->op_flags & OPf_REF) {
832 if (gimme != G_ARRAY)
833 Perl_croak(aTHX_ is_pp_rv2av ? return_array_to_lvalue_scalar
834 : return_hash_to_lvalue_scalar);
838 else if (PL_op->op_flags & OPf_MOD
839 && PL_op->op_private & OPpLVAL_INTRO)
840 Perl_croak(aTHX_ PL_no_localize_ref);
843 if (SvTYPE(sv) == type) {
844 if (PL_op->op_flags & OPf_REF) {
849 if (gimme != G_ARRAY)
851 is_pp_rv2av ? return_array_to_lvalue_scalar
852 : return_hash_to_lvalue_scalar);
860 if (SvTYPE(sv) != SVt_PVGV) {
861 if (SvGMAGICAL(sv)) {
866 gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
874 sv = is_pp_rv2av ? (SV*)GvAVn(gv) : (SV*)GvHVn(gv);
875 if (PL_op->op_private & OPpLVAL_INTRO)
876 sv = is_pp_rv2av ? (SV*)save_ary(gv) : (SV*)save_hash(gv);
877 if (PL_op->op_flags & OPf_REF) {
882 if (gimme != G_ARRAY)
884 is_pp_rv2av ? return_array_to_lvalue_scalar
885 : return_hash_to_lvalue_scalar);
893 AV *const av = (AV*)sv;
894 /* The guts of pp_rv2av, with no intenting change to preserve history
895 (until such time as we get tools that can do blame annotation across
896 whitespace changes. */
897 if (gimme == G_ARRAY) {
898 const I32 maxarg = AvFILL(av) + 1;
899 (void)POPs; /* XXXX May be optimized away? */
901 if (SvRMAGICAL(av)) {
903 for (i=0; i < (U32)maxarg; i++) {
904 SV ** const svp = av_fetch(av, i, FALSE);
905 /* See note in pp_helem, and bug id #27839 */
907 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
912 Copy(AvARRAY(av), SP+1, maxarg, SV*);
916 else if (gimme == G_SCALAR) {
918 const I32 maxarg = AvFILL(av) + 1;
922 /* The guts of pp_rv2hv */
923 if (gimme == G_ARRAY) { /* array wanted */
927 else if (gimme == G_SCALAR) {
929 TARG = Perl_hv_scalar(aTHX_ (HV*)sv);
938 S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
945 if (ckWARN(WARN_MISC)) {
947 if (relem == firstrelem &&
949 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
950 SvTYPE(SvRV(*relem)) == SVt_PVHV))
952 err = "Reference found where even-sized list expected";
955 err = "Odd number of elements in hash assignment";
956 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
960 didstore = hv_store_ent(hash,*relem,tmpstr,0);
961 if (SvMAGICAL(hash)) {
962 if (SvSMAGICAL(tmpstr))
974 SV **lastlelem = PL_stack_sp;
975 SV **lastrelem = PL_stack_base + POPMARK;
976 SV **firstrelem = PL_stack_base + POPMARK + 1;
977 SV **firstlelem = lastrelem + 1;
990 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
992 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
995 /* If there's a common identifier on both sides we have to take
996 * special care that assigning the identifier on the left doesn't
997 * clobber a value on the right that's used later in the list.
999 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
1000 EXTEND_MORTAL(lastrelem - firstrelem + 1);
1001 for (relem = firstrelem; relem <= lastrelem; relem++) {
1002 if ((sv = *relem)) {
1003 TAINT_NOT; /* Each item is independent */
1004 *relem = sv_mortalcopy(sv);
1014 while (lelem <= lastlelem) {
1015 TAINT_NOT; /* Each item stands on its own, taintwise. */
1017 switch (SvTYPE(sv)) {
1020 magic = SvMAGICAL(ary) != 0;
1022 av_extend(ary, lastrelem - relem);
1024 while (relem <= lastrelem) { /* gobble up all the rest */
1027 sv = newSVsv(*relem);
1029 didstore = av_store(ary,i++,sv);
1038 if (PL_delaymagic & DM_ARRAY)
1039 SvSETMAGIC((SV*)ary);
1041 case SVt_PVHV: { /* normal hash */
1045 magic = SvMAGICAL(hash) != 0;
1047 firsthashrelem = relem;
1049 while (relem < lastrelem) { /* gobble up all the rest */
1051 sv = *relem ? *relem : &PL_sv_no;
1055 sv_setsv(tmpstr,*relem); /* value */
1056 *(relem++) = tmpstr;
1057 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1058 /* key overwrites an existing entry */
1060 didstore = hv_store_ent(hash,sv,tmpstr,0);
1062 if (SvSMAGICAL(tmpstr))
1069 if (relem == lastrelem) {
1070 do_oddball(hash, relem, firstrelem);
1076 if (SvIMMORTAL(sv)) {
1077 if (relem <= lastrelem)
1081 if (relem <= lastrelem) {
1082 sv_setsv(sv, *relem);
1086 sv_setsv(sv, &PL_sv_undef);
1091 if (PL_delaymagic & ~DM_DELAY) {
1092 if (PL_delaymagic & DM_UID) {
1093 #ifdef HAS_SETRESUID
1094 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1095 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1098 # ifdef HAS_SETREUID
1099 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1100 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
1103 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1104 (void)setruid(PL_uid);
1105 PL_delaymagic &= ~DM_RUID;
1107 # endif /* HAS_SETRUID */
1109 if ((PL_delaymagic & DM_UID) == DM_EUID) {
1110 (void)seteuid(PL_euid);
1111 PL_delaymagic &= ~DM_EUID;
1113 # endif /* HAS_SETEUID */
1114 if (PL_delaymagic & DM_UID) {
1115 if (PL_uid != PL_euid)
1116 DIE(aTHX_ "No setreuid available");
1117 (void)PerlProc_setuid(PL_uid);
1119 # endif /* HAS_SETREUID */
1120 #endif /* HAS_SETRESUID */
1121 PL_uid = PerlProc_getuid();
1122 PL_euid = PerlProc_geteuid();
1124 if (PL_delaymagic & DM_GID) {
1125 #ifdef HAS_SETRESGID
1126 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1127 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1130 # ifdef HAS_SETREGID
1131 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1132 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
1135 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1136 (void)setrgid(PL_gid);
1137 PL_delaymagic &= ~DM_RGID;
1139 # endif /* HAS_SETRGID */
1141 if ((PL_delaymagic & DM_GID) == DM_EGID) {
1142 (void)setegid(PL_egid);
1143 PL_delaymagic &= ~DM_EGID;
1145 # endif /* HAS_SETEGID */
1146 if (PL_delaymagic & DM_GID) {
1147 if (PL_gid != PL_egid)
1148 DIE(aTHX_ "No setregid available");
1149 (void)PerlProc_setgid(PL_gid);
1151 # endif /* HAS_SETREGID */
1152 #endif /* HAS_SETRESGID */
1153 PL_gid = PerlProc_getgid();
1154 PL_egid = PerlProc_getegid();
1156 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
1160 if (gimme == G_VOID)
1161 SP = firstrelem - 1;
1162 else if (gimme == G_SCALAR) {
1165 SETi(lastrelem - firstrelem + 1 - duplicates);
1172 /* Removes from the stack the entries which ended up as
1173 * duplicated keys in the hash (fix for [perl #24380]) */
1174 Move(firsthashrelem + duplicates,
1175 firsthashrelem, duplicates, SV**);
1176 lastrelem -= duplicates;
1181 SP = firstrelem + (lastlelem - firstlelem);
1182 lelem = firstlelem + (relem - firstrelem);
1184 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
1193 register PMOP * const pm = cPMOP;
1194 REGEXP * rx = PM_GETRE(pm);
1195 SV * const pkg = CALLREG_PACKAGE(rx);
1196 SV * const rv = sv_newmortal();
1197 SV * const sv = newSVrv(rv, pkg ? SvPV_nolen(pkg) : NULL);
1198 if (rx->extflags & RXf_TAINTED)
1200 sv_upgrade(sv, SVt_REGEXP);
1201 ((struct xregexp *)SvANY(sv))->xrx_regexp = ReREFCNT_inc(rx);
1209 register PMOP *pm = cPMOP;
1211 register const char *t;
1212 register const char *s;
1215 I32 r_flags = REXEC_CHECKED;
1216 const char *truebase; /* Start of string */
1217 register REGEXP *rx = PM_GETRE(pm);
1219 const I32 gimme = GIMME;
1222 const I32 oldsave = PL_savestack_ix;
1223 I32 update_minmatch = 1;
1224 I32 had_zerolen = 0;
1227 if (PL_op->op_flags & OPf_STACKED)
1229 else if (PL_op->op_private & OPpTARGET_MY)
1236 PUTBACK; /* EVAL blocks need stack_sp. */
1237 s = SvPV_const(TARG, len);
1239 DIE(aTHX_ "panic: pp_match");
1241 rxtainted = ((rx->extflags & RXf_TAINTED) ||
1242 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
1245 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
1247 /* PMdf_USED is set after a ?? matches once */
1250 SvREADONLY(PL_regex_pad[pm->op_pmoffset])
1252 pm->op_pmflags & PMf_USED
1256 if (gimme == G_ARRAY)
1263 /* empty pattern special-cased to use last successful pattern if possible */
1264 if (!RX_PRELEN(rx) && PL_curpm) {
1269 if (rx->minlen > (I32)len)
1274 /* XXXX What part of this is needed with true \G-support? */
1275 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
1276 rx->offs[0].start = -1;
1277 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
1278 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
1279 if (mg && mg->mg_len >= 0) {
1280 if (!(rx->extflags & RXf_GPOS_SEEN))
1281 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
1282 else if (rx->extflags & RXf_ANCH_GPOS) {
1283 r_flags |= REXEC_IGNOREPOS;
1284 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
1285 } else if (rx->extflags & RXf_GPOS_FLOAT)
1288 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
1289 minmatch = (mg->mg_flags & MGf_MINMATCH) ? rx->gofs + 1 : 0;
1290 update_minmatch = 0;
1294 /* XXX: comment out !global get safe $1 vars after a
1295 match, BUT be aware that this leads to dramatic slowdowns on
1296 /g matches against large strings. So far a solution to this problem
1297 appears to be quite tricky.
1298 Test for the unsafe vars are TODO for now. */
1299 if (( !global && rx->nparens)
1300 || SvTEMP(TARG) || PL_sawampersand ||
1301 (rx->extflags & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
1302 r_flags |= REXEC_COPY_STR;
1304 r_flags |= REXEC_SCREAM;
1307 if (global && rx->offs[0].start != -1) {
1308 t = s = rx->offs[0].end + truebase - rx->gofs;
1309 if ((s + rx->minlen) > strend || s < truebase)
1311 if (update_minmatch++)
1312 minmatch = had_zerolen;
1314 if (rx->extflags & RXf_USE_INTUIT &&
1315 DO_UTF8(TARG) == ((rx->extflags & RXf_UTF8) != 0)) {
1316 /* FIXME - can PL_bostr be made const char *? */
1317 PL_bostr = (char *)truebase;
1318 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
1322 if ( (rx->extflags & RXf_CHECK_ALL)
1324 && !(rx->extflags & RXf_PMf_KEEPCOPY)
1325 && ((rx->extflags & RXf_NOSCAN)
1326 || !((rx->extflags & RXf_INTUIT_TAIL)
1327 && (r_flags & REXEC_SCREAM)))
1328 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
1331 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase,
1332 minmatch, TARG, NUM2PTR(void*, gpos), r_flags))
1335 if (dynpm->op_pmflags & PMf_ONCE) {
1337 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1339 dynpm->op_pmflags |= PMf_USED;
1350 RX_MATCH_TAINTED_on(rx);
1351 TAINT_IF(RX_MATCH_TAINTED(rx));
1352 if (gimme == G_ARRAY) {
1353 const I32 nparens = rx->nparens;
1354 I32 i = (global && !nparens) ? 1 : 0;
1356 SPAGAIN; /* EVAL blocks could move the stack. */
1357 EXTEND(SP, nparens + i);
1358 EXTEND_MORTAL(nparens + i);
1359 for (i = !i; i <= nparens; i++) {
1360 PUSHs(sv_newmortal());
1361 if ((rx->offs[i].start != -1) && rx->offs[i].end != -1 ) {
1362 const I32 len = rx->offs[i].end - rx->offs[i].start;
1363 s = rx->offs[i].start + truebase;
1364 if (rx->offs[i].end < 0 || rx->offs[i].start < 0 ||
1365 len < 0 || len > strend - s)
1366 DIE(aTHX_ "panic: pp_match start/end pointers");
1367 sv_setpvn(*SP, s, len);
1368 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
1373 if (dynpm->op_pmflags & PMf_CONTINUE) {
1375 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1376 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1378 #ifdef PERL_OLD_COPY_ON_WRITE
1380 sv_force_normal_flags(TARG, 0);
1382 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1383 &PL_vtbl_mglob, NULL, 0);
1385 if (rx->offs[0].start != -1) {
1386 mg->mg_len = rx->offs[0].end;
1387 if (rx->offs[0].start + rx->gofs == (UV)rx->offs[0].end)
1388 mg->mg_flags |= MGf_MINMATCH;
1390 mg->mg_flags &= ~MGf_MINMATCH;
1393 had_zerolen = (rx->offs[0].start != -1
1394 && (rx->offs[0].start + rx->gofs
1395 == (UV)rx->offs[0].end));
1396 PUTBACK; /* EVAL blocks may use stack */
1397 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
1402 LEAVE_SCOPE(oldsave);
1408 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1409 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1413 #ifdef PERL_OLD_COPY_ON_WRITE
1415 sv_force_normal_flags(TARG, 0);
1417 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1418 &PL_vtbl_mglob, NULL, 0);
1420 if (rx->offs[0].start != -1) {
1421 mg->mg_len = rx->offs[0].end;
1422 if (rx->offs[0].start + rx->gofs == (UV)rx->offs[0].end)
1423 mg->mg_flags |= MGf_MINMATCH;
1425 mg->mg_flags &= ~MGf_MINMATCH;
1428 LEAVE_SCOPE(oldsave);
1432 yup: /* Confirmed by INTUIT */
1434 RX_MATCH_TAINTED_on(rx);
1435 TAINT_IF(RX_MATCH_TAINTED(rx));
1437 if (dynpm->op_pmflags & PMf_ONCE) {
1439 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1441 dynpm->op_pmflags |= PMf_USED;
1444 if (RX_MATCH_COPIED(rx))
1445 Safefree(rx->subbeg);
1446 RX_MATCH_COPIED_off(rx);
1449 /* FIXME - should rx->subbeg be const char *? */
1450 rx->subbeg = (char *) truebase;
1451 rx->offs[0].start = s - truebase;
1452 if (RX_MATCH_UTF8(rx)) {
1453 char * const t = (char*)utf8_hop((U8*)s, rx->minlenret);
1454 rx->offs[0].end = t - truebase;
1457 rx->offs[0].end = s - truebase + rx->minlenret;
1459 rx->sublen = strend - truebase;
1462 if (PL_sawampersand || rx->extflags & RXf_PMf_KEEPCOPY) {
1464 #ifdef PERL_OLD_COPY_ON_WRITE
1465 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1467 PerlIO_printf(Perl_debug_log,
1468 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
1469 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
1472 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
1473 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
1474 assert (SvPOKp(rx->saved_copy));
1479 rx->subbeg = savepvn(t, strend - t);
1480 #ifdef PERL_OLD_COPY_ON_WRITE
1481 rx->saved_copy = NULL;
1484 rx->sublen = strend - t;
1485 RX_MATCH_COPIED_on(rx);
1486 off = rx->offs[0].start = s - t;
1487 rx->offs[0].end = off + rx->minlenret;
1489 else { /* startp/endp are used by @- @+. */
1490 rx->offs[0].start = s - truebase;
1491 rx->offs[0].end = s - truebase + rx->minlenret;
1493 /* including rx->nparens in the below code seems highly suspicious.
1495 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
1496 LEAVE_SCOPE(oldsave);
1501 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
1502 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
1503 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
1508 LEAVE_SCOPE(oldsave);
1509 if (gimme == G_ARRAY)
1515 Perl_do_readline(pTHX)
1517 dVAR; dSP; dTARGETSTACKED;
1522 register IO * const io = GvIO(PL_last_in_gv);
1523 register const I32 type = PL_op->op_type;
1524 const I32 gimme = GIMME_V;
1527 MAGIC * const mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar);
1530 XPUSHs(SvTIED_obj((SV*)io, mg));
1533 call_method("READLINE", gimme);
1536 if (gimme == G_SCALAR) {
1537 SV* const result = POPs;
1538 SvSetSV_nosteal(TARG, result);
1548 if (IoFLAGS(io) & IOf_ARGV) {
1549 if (IoFLAGS(io) & IOf_START) {
1551 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1552 IoFLAGS(io) &= ~IOf_START;
1553 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
1554 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
1555 SvSETMAGIC(GvSV(PL_last_in_gv));
1560 fp = nextargv(PL_last_in_gv);
1561 if (!fp) { /* Note: fp != IoIFP(io) */
1562 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
1565 else if (type == OP_GLOB)
1566 fp = Perl_start_glob(aTHX_ POPs, io);
1568 else if (type == OP_GLOB)
1570 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
1571 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
1575 if ((!io || !(IoFLAGS(io) & IOf_START))
1576 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1578 if (type == OP_GLOB)
1579 Perl_warner(aTHX_ packWARN(WARN_GLOB),
1580 "glob failed (can't start child: %s)",
1583 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
1585 if (gimme == G_SCALAR) {
1586 /* undef TARG, and push that undefined value */
1587 if (type != OP_RCATLINE) {
1588 SV_CHECK_THINKFIRST_COW_DROP(TARG);
1596 if (gimme == G_SCALAR) {
1598 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1601 if (type == OP_RCATLINE)
1602 SvPV_force_nolen(sv);
1606 else if (isGV_with_GP(sv)) {
1607 SvPV_force_nolen(sv);
1609 SvUPGRADE(sv, SVt_PV);
1610 tmplen = SvLEN(sv); /* remember if already alloced */
1611 if (!tmplen && !SvREADONLY(sv))
1612 Sv_Grow(sv, 80); /* try short-buffering it */
1614 if (type == OP_RCATLINE && SvOK(sv)) {
1616 SvPV_force_nolen(sv);
1622 sv = sv_2mortal(newSV(80));
1626 /* This should not be marked tainted if the fp is marked clean */
1627 #define MAYBE_TAINT_LINE(io, sv) \
1628 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1633 /* delay EOF state for a snarfed empty file */
1634 #define SNARF_EOF(gimme,rs,io,sv) \
1635 (gimme != G_SCALAR || SvCUR(sv) \
1636 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
1640 if (!sv_gets(sv, fp, offset)
1642 || SNARF_EOF(gimme, PL_rs, io, sv)
1643 || PerlIO_error(fp)))
1645 PerlIO_clearerr(fp);
1646 if (IoFLAGS(io) & IOf_ARGV) {
1647 fp = nextargv(PL_last_in_gv);
1650 (void)do_close(PL_last_in_gv, FALSE);
1652 else if (type == OP_GLOB) {
1653 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
1654 Perl_warner(aTHX_ packWARN(WARN_GLOB),
1655 "glob failed (child exited with status %d%s)",
1656 (int)(STATUS_CURRENT >> 8),
1657 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
1660 if (gimme == G_SCALAR) {
1661 if (type != OP_RCATLINE) {
1662 SV_CHECK_THINKFIRST_COW_DROP(TARG);
1668 MAYBE_TAINT_LINE(io, sv);
1671 MAYBE_TAINT_LINE(io, sv);
1673 IoFLAGS(io) |= IOf_NOLINE;
1677 if (type == OP_GLOB) {
1680 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
1681 char * const tmps = SvEND(sv) - 1;
1682 if (*tmps == *SvPVX_const(PL_rs)) {
1684 SvCUR_set(sv, SvCUR(sv) - 1);
1687 for (t1 = SvPVX_const(sv); *t1; t1++)
1688 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1689 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
1691 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
1692 (void)POPs; /* Unmatched wildcard? Chuck it... */
1695 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
1696 if (ckWARN(WARN_UTF8)) {
1697 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1698 const STRLEN len = SvCUR(sv) - offset;
1701 if (!is_utf8_string_loc(s, len, &f))
1702 /* Emulate :encoding(utf8) warning in the same case. */
1703 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1704 "utf8 \"\\x%02X\" does not map to Unicode",
1705 f < (U8*)SvEND(sv) ? *f : 0);
1708 if (gimme == G_ARRAY) {
1709 if (SvLEN(sv) - SvCUR(sv) > 20) {
1710 SvPV_shrink_to_cur(sv);
1712 sv = sv_2mortal(newSV(80));
1715 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
1716 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1717 const STRLEN new_len
1718 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1719 SvPV_renew(sv, new_len);
1728 register PERL_CONTEXT *cx;
1729 I32 gimme = OP_GIMME(PL_op, -1);
1732 if (cxstack_ix >= 0)
1733 gimme = cxstack[cxstack_ix].blk_gimme;
1741 PUSHBLOCK(cx, CXt_BLOCK, SP);
1751 SV * const keysv = POPs;
1752 HV * const hv = (HV*)POPs;
1753 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1754 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
1756 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
1759 if (SvTYPE(hv) != SVt_PVHV)
1762 if (PL_op->op_private & OPpLVAL_INTRO) {
1765 /* does the element we're localizing already exist? */
1766 preeminent = /* can we determine whether it exists? */
1768 || mg_find((SV*)hv, PERL_MAGIC_env)
1769 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1770 /* Try to preserve the existenceness of a tied hash
1771 * element by using EXISTS and DELETE if possible.
1772 * Fallback to FETCH and STORE otherwise */
1773 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1774 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1775 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1777 ) ? hv_exists_ent(hv, keysv, 0) : 1;
1779 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1780 svp = he ? &HeVAL(he) : NULL;
1782 if (!svp || *svp == &PL_sv_undef) {
1786 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
1788 lv = sv_newmortal();
1789 sv_upgrade(lv, SVt_PVLV);
1791 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
1792 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1793 LvTARG(lv) = SvREFCNT_inc_simple(hv);
1798 if (PL_op->op_private & OPpLVAL_INTRO) {
1799 if (HvNAME_get(hv) && isGV(*svp))
1800 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1804 const char * const key = SvPV_const(keysv, keylen);
1805 SAVEDELETE(hv, savepvn(key,keylen),
1806 SvUTF8(keysv) ? -(I32)keylen : (I32)keylen);
1808 save_helem(hv, keysv, svp);
1811 else if (PL_op->op_private & OPpDEREF)
1812 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
1814 sv = (svp ? *svp : &PL_sv_undef);
1815 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1816 * Pushing the magical RHS on to the stack is useless, since
1817 * that magic is soon destined to be misled by the local(),
1818 * and thus the later pp_sassign() will fail to mg_get() the
1819 * old value. This should also cure problems with delayed
1820 * mg_get()s. GSAR 98-07-03 */
1821 if (!lval && SvGMAGICAL(sv))
1822 sv = sv_mortalcopy(sv);
1830 register PERL_CONTEXT *cx;
1835 if (PL_op->op_flags & OPf_SPECIAL) {
1836 cx = &cxstack[cxstack_ix];
1837 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
1842 gimme = OP_GIMME(PL_op, -1);
1844 if (cxstack_ix >= 0)
1845 gimme = cxstack[cxstack_ix].blk_gimme;
1851 if (gimme == G_VOID)
1853 else if (gimme == G_SCALAR) {
1857 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1860 *MARK = sv_mortalcopy(TOPs);
1863 *MARK = &PL_sv_undef;
1867 else if (gimme == G_ARRAY) {
1868 /* in case LEAVE wipes old return values */
1870 for (mark = newsp + 1; mark <= SP; mark++) {
1871 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
1872 *mark = sv_mortalcopy(*mark);
1873 TAINT_NOT; /* Each item is independent */
1877 PL_curpm = newpm; /* Don't pop $1 et al till now */
1887 register PERL_CONTEXT *cx;
1893 cx = &cxstack[cxstack_ix];
1894 if (CxTYPE(cx) != CXt_LOOP)
1895 DIE(aTHX_ "panic: pp_iter");
1897 itersvp = CxITERVAR(cx);
1898 av = cx->blk_loop.iterary;
1899 if (SvTYPE(av) != SVt_PVAV) {
1900 /* iterate ($min .. $max) */
1901 if (cx->blk_loop.iterlval) {
1902 /* string increment */
1903 register SV* cur = cx->blk_loop.iterlval;
1907 SvPV_const((SV*)av, maxlen) : (const char *)"";
1908 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1909 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
1910 /* safe to reuse old SV */
1911 sv_setsv(*itersvp, cur);
1915 /* we need a fresh SV every time so that loop body sees a
1916 * completely new SV for closures/references to work as
1919 *itersvp = newSVsv(cur);
1920 SvREFCNT_dec(oldsv);
1922 if (strEQ(SvPVX_const(cur), max))
1923 sv_setiv(cur, 0); /* terminate next time */
1930 /* integer increment */
1931 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1934 /* don't risk potential race */
1935 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
1936 /* safe to reuse old SV */
1937 sv_setiv(*itersvp, cx->blk_loop.iterix++);
1941 /* we need a fresh SV every time so that loop body sees a
1942 * completely new SV for closures/references to work as they
1945 *itersvp = newSViv(cx->blk_loop.iterix++);
1946 SvREFCNT_dec(oldsv);
1952 if (PL_op->op_private & OPpITER_REVERSED) {
1953 /* In reverse, use itermax as the min :-) */
1954 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
1957 if (SvMAGICAL(av) || AvREIFY(av)) {
1958 SV * const * const svp = av_fetch(av, --cx->blk_loop.iterix, FALSE);
1959 sv = svp ? *svp : NULL;
1962 sv = AvARRAY(av)[--cx->blk_loop.iterix];
1966 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
1970 if (SvMAGICAL(av) || AvREIFY(av)) {
1971 SV * const * const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
1972 sv = svp ? *svp : NULL;
1975 sv = AvARRAY(av)[++cx->blk_loop.iterix];
1979 if (sv && SvIS_FREED(sv)) {
1981 Perl_croak(aTHX_ "Use of freed value in iteration");
1988 if (av != PL_curstack && sv == &PL_sv_undef) {
1989 SV *lv = cx->blk_loop.iterlval;
1990 if (lv && SvREFCNT(lv) > 1) {
1995 SvREFCNT_dec(LvTARG(lv));
1997 lv = cx->blk_loop.iterlval = newSV_type(SVt_PVLV);
1999 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
2001 LvTARG(lv) = SvREFCNT_inc_simple(av);
2002 LvTARGOFF(lv) = cx->blk_loop.iterix;
2003 LvTARGLEN(lv) = (STRLEN)UV_MAX;
2008 *itersvp = SvREFCNT_inc_simple_NN(sv);
2009 SvREFCNT_dec(oldsv);
2017 register PMOP *pm = cPMOP;
2032 register REGEXP *rx = PM_GETRE(pm);
2034 int force_on_match = 0;
2035 const I32 oldsave = PL_savestack_ix;
2037 bool doutf8 = FALSE;
2038 #ifdef PERL_OLD_COPY_ON_WRITE
2043 /* known replacement string? */
2044 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
2045 if (PL_op->op_flags & OPf_STACKED)
2047 else if (PL_op->op_private & OPpTARGET_MY)
2054 #ifdef PERL_OLD_COPY_ON_WRITE
2055 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2056 because they make integers such as 256 "false". */
2057 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2060 sv_force_normal_flags(TARG,0);
2063 #ifdef PERL_OLD_COPY_ON_WRITE
2067 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2068 || SvTYPE(TARG) > SVt_PVLV)
2069 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
2070 DIE(aTHX_ PL_no_modify);
2073 s = SvPV_mutable(TARG, len);
2074 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
2076 rxtainted = ((rx->extflags & RXf_TAINTED) ||
2077 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2082 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
2086 DIE(aTHX_ "panic: pp_subst");
2089 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
2090 maxiters = 2 * slen + 10; /* We can match twice at each
2091 position, once with zero-length,
2092 second time with non-zero. */
2094 if (!RX_PRELEN(rx) && PL_curpm) {
2098 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand
2099 || (rx->extflags & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) )
2100 ? REXEC_COPY_STR : 0;
2102 r_flags |= REXEC_SCREAM;
2105 if (rx->extflags & RXf_USE_INTUIT) {
2107 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
2111 /* How to do it in subst? */
2112 /* if ( (rx->extflags & RXf_CHECK_ALL)
2114 && !(rx->extflags & RXf_KEEPCOPY)
2115 && ((rx->extflags & RXf_NOSCAN)
2116 || !((rx->extflags & RXf_INTUIT_TAIL)
2117 && (r_flags & REXEC_SCREAM))))
2122 /* only replace once? */
2123 once = !(rpm->op_pmflags & PMf_GLOBAL);
2125 /* known replacement string? */
2127 /* replacement needing upgrading? */
2128 if (DO_UTF8(TARG) && !doutf8) {
2129 nsv = sv_newmortal();
2132 sv_recode_to_utf8(nsv, PL_encoding);
2134 sv_utf8_upgrade(nsv);
2135 c = SvPV_const(nsv, clen);
2139 c = SvPV_const(dstr, clen);
2140 doutf8 = DO_UTF8(dstr);
2148 /* can do inplace substitution? */
2150 #ifdef PERL_OLD_COPY_ON_WRITE
2153 && (I32)clen <= rx->minlenret && (once || !(r_flags & REXEC_COPY_STR))
2154 && !(rx->extflags & RXf_LOOKBEHIND_SEEN)
2155 && (!doutf8 || SvUTF8(TARG))) {
2156 if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
2157 r_flags | REXEC_CHECKED))
2161 LEAVE_SCOPE(oldsave);
2164 #ifdef PERL_OLD_COPY_ON_WRITE
2165 if (SvIsCOW(TARG)) {
2166 assert (!force_on_match);
2170 if (force_on_match) {
2172 s = SvPV_force(TARG, len);
2177 SvSCREAM_off(TARG); /* disable possible screamer */
2179 rxtainted |= RX_MATCH_TAINTED(rx);
2180 m = orig + rx->offs[0].start;
2181 d = orig + rx->offs[0].end;
2183 if (m - s > strend - d) { /* faster to shorten from end */
2185 Copy(c, m, clen, char);
2190 Move(d, m, i, char);
2194 SvCUR_set(TARG, m - s);
2196 else if ((i = m - s)) { /* faster from front */
2204 Copy(c, m, clen, char);
2209 Copy(c, d, clen, char);
2214 TAINT_IF(rxtainted & 1);
2220 if (iters++ > maxiters)
2221 DIE(aTHX_ "Substitution loop");
2222 rxtainted |= RX_MATCH_TAINTED(rx);
2223 m = rx->offs[0].start + orig;
2226 Move(s, d, i, char);
2230 Copy(c, d, clen, char);
2233 s = rx->offs[0].end + orig;
2234 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
2236 /* don't match same null twice */
2237 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
2240 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
2241 Move(s, d, i+1, char); /* include the NUL */
2243 TAINT_IF(rxtainted & 1);
2245 PUSHs(sv_2mortal(newSViv((I32)iters)));
2247 (void)SvPOK_only_UTF8(TARG);
2248 TAINT_IF(rxtainted);
2249 if (SvSMAGICAL(TARG)) {
2257 LEAVE_SCOPE(oldsave);
2261 if (CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
2262 r_flags | REXEC_CHECKED))
2264 if (force_on_match) {
2266 s = SvPV_force(TARG, len);
2269 #ifdef PERL_OLD_COPY_ON_WRITE
2272 rxtainted |= RX_MATCH_TAINTED(rx);
2273 dstr = newSVpvn(m, s-m);
2279 register PERL_CONTEXT *cx;
2282 RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot);
2284 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
2286 if (iters++ > maxiters)
2287 DIE(aTHX_ "Substitution loop");
2288 rxtainted |= RX_MATCH_TAINTED(rx);
2289 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
2294 strend = s + (strend - m);
2296 m = rx->offs[0].start + orig;
2297 if (doutf8 && !SvUTF8(dstr))
2298 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2300 sv_catpvn(dstr, s, m-s);
2301 s = rx->offs[0].end + orig;
2303 sv_catpvn(dstr, c, clen);
2306 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
2307 TARG, NULL, r_flags));
2308 if (doutf8 && !DO_UTF8(TARG))
2309 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
2311 sv_catpvn(dstr, s, strend - s);
2313 #ifdef PERL_OLD_COPY_ON_WRITE
2314 /* The match may make the string COW. If so, brilliant, because that's
2315 just saved us one malloc, copy and free - the regexp has donated
2316 the old buffer, and we malloc an entirely new one, rather than the
2317 regexp malloc()ing a buffer and copying our original, only for
2318 us to throw it away here during the substitution. */
2319 if (SvIsCOW(TARG)) {
2320 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2326 SvPV_set(TARG, SvPVX(dstr));
2327 SvCUR_set(TARG, SvCUR(dstr));
2328 SvLEN_set(TARG, SvLEN(dstr));
2329 doutf8 |= DO_UTF8(dstr);
2330 SvPV_set(dstr, NULL);
2332 TAINT_IF(rxtainted & 1);
2334 PUSHs(sv_2mortal(newSViv((I32)iters)));
2336 (void)SvPOK_only(TARG);
2339 TAINT_IF(rxtainted);
2342 LEAVE_SCOPE(oldsave);
2351 LEAVE_SCOPE(oldsave);
2360 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2361 ++*PL_markstack_ptr;
2362 LEAVE; /* exit inner scope */
2365 if (PL_stack_base + *PL_markstack_ptr > SP) {
2367 const I32 gimme = GIMME_V;
2369 LEAVE; /* exit outer scope */
2370 (void)POPMARK; /* pop src */
2371 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
2372 (void)POPMARK; /* pop dst */
2373 SP = PL_stack_base + POPMARK; /* pop original mark */
2374 if (gimme == G_SCALAR) {
2375 if (PL_op->op_private & OPpGREP_LEX) {
2376 SV* const sv = sv_newmortal();
2377 sv_setiv(sv, items);
2385 else if (gimme == G_ARRAY)
2392 ENTER; /* enter inner scope */
2395 src = PL_stack_base[*PL_markstack_ptr];
2397 if (PL_op->op_private & OPpGREP_LEX)
2398 PAD_SVl(PL_op->op_targ) = src;
2402 RETURNOP(cLOGOP->op_other);
2413 register PERL_CONTEXT *cx;
2416 if (CxMULTICALL(&cxstack[cxstack_ix]))
2420 cxstack_ix++; /* temporarily protect top context */
2423 if (gimme == G_SCALAR) {
2426 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
2428 *MARK = SvREFCNT_inc(TOPs);
2433 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
2435 *MARK = sv_mortalcopy(sv);
2440 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2444 *MARK = &PL_sv_undef;
2448 else if (gimme == G_ARRAY) {
2449 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2450 if (!SvTEMP(*MARK)) {
2451 *MARK = sv_mortalcopy(*MARK);
2452 TAINT_NOT; /* Each item is independent */
2460 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2461 PL_curpm = newpm; /* ... and pop $1 et al */
2464 return cx->blk_sub.retop;
2467 /* This duplicates the above code because the above code must not
2468 * get any slower by more conditions */
2476 register PERL_CONTEXT *cx;
2479 if (CxMULTICALL(&cxstack[cxstack_ix]))
2483 cxstack_ix++; /* temporarily protect top context */
2487 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
2488 /* We are an argument to a function or grep().
2489 * This kind of lvalueness was legal before lvalue
2490 * subroutines too, so be backward compatible:
2491 * cannot report errors. */
2493 /* Scalar context *is* possible, on the LHS of -> only,
2494 * as in f()->meth(). But this is not an lvalue. */
2495 if (gimme == G_SCALAR)
2497 if (gimme == G_ARRAY) {
2498 if (!CvLVALUE(cx->blk_sub.cv))
2499 goto temporise_array;
2500 EXTEND_MORTAL(SP - newsp);
2501 for (mark = newsp + 1; mark <= SP; mark++) {
2504 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2505 *mark = sv_mortalcopy(*mark);
2507 /* Can be a localized value subject to deletion. */
2508 PL_tmps_stack[++PL_tmps_ix] = *mark;
2509 SvREFCNT_inc_void(*mark);
2514 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
2515 /* Here we go for robustness, not for speed, so we change all
2516 * the refcounts so the caller gets a live guy. Cannot set
2517 * TEMP, so sv_2mortal is out of question. */
2518 if (!CvLVALUE(cx->blk_sub.cv)) {
2524 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2526 if (gimme == G_SCALAR) {
2530 /* Temporaries are bad unless they happen to be elements
2531 * of a tied hash or array */
2532 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2533 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
2539 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2540 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2541 : "a readonly value" : "a temporary");
2543 else { /* Can be a localized value
2544 * subject to deletion. */
2545 PL_tmps_stack[++PL_tmps_ix] = *mark;
2546 SvREFCNT_inc_void(*mark);
2549 else { /* Should not happen? */
2555 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
2556 (MARK > SP ? "Empty array" : "Array"));
2560 else if (gimme == G_ARRAY) {
2561 EXTEND_MORTAL(SP - newsp);
2562 for (mark = newsp + 1; mark <= SP; mark++) {
2563 if (*mark != &PL_sv_undef
2564 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
2565 /* Might be flattened array after $#array = */
2572 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2573 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2576 /* Can be a localized value subject to deletion. */
2577 PL_tmps_stack[++PL_tmps_ix] = *mark;
2578 SvREFCNT_inc_void(*mark);
2584 if (gimme == G_SCALAR) {
2588 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
2590 *MARK = SvREFCNT_inc(TOPs);
2595 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
2597 *MARK = sv_mortalcopy(sv);
2602 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2606 *MARK = &PL_sv_undef;
2610 else if (gimme == G_ARRAY) {
2612 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2613 if (!SvTEMP(*MARK)) {
2614 *MARK = sv_mortalcopy(*MARK);
2615 TAINT_NOT; /* Each item is independent */
2624 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2625 PL_curpm = newpm; /* ... and pop $1 et al */
2628 return cx->blk_sub.retop;
2636 register PERL_CONTEXT *cx;
2638 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
2641 DIE(aTHX_ "Not a CODE reference");
2642 switch (SvTYPE(sv)) {
2643 /* This is overwhelming the most common case: */
2645 if (!(cv = GvCVu((GV*)sv))) {
2647 cv = sv_2cv(sv, &stash, &gv, 0);
2659 if (sv == &PL_sv_yes) { /* unfound import, ignore */
2661 SP = PL_stack_base + POPMARK;
2664 if (SvGMAGICAL(sv)) {
2669 sym = SvPVX_const(sv);
2677 sym = SvPV_const(sv, len);
2680 DIE(aTHX_ PL_no_usym, "a subroutine");
2681 if (PL_op->op_private & HINT_STRICT_REFS)
2682 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
2683 cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv));
2688 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
2689 tryAMAGICunDEREF(to_cv);
2692 if (SvTYPE(cv) == SVt_PVCV)
2697 DIE(aTHX_ "Not a CODE reference");
2698 /* This is the second most common case: */
2708 if (!CvROOT(cv) && !CvXSUB(cv)) {
2712 /* anonymous or undef'd function leaves us no recourse */
2713 if (CvANON(cv) || !(gv = CvGV(cv)))
2714 DIE(aTHX_ "Undefined subroutine called");
2716 /* autoloaded stub? */
2717 if (cv != GvCV(gv)) {
2720 /* should call AUTOLOAD now? */
2723 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2730 sub_name = sv_newmortal();
2731 gv_efullname3(sub_name, gv, NULL);
2732 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2736 DIE(aTHX_ "Not a CODE reference");
2741 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
2742 Perl_get_db_sub(aTHX_ &sv, cv);
2744 PL_curcopdb = PL_curcop;
2745 cv = GvCV(PL_DBsub);
2747 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2748 DIE(aTHX_ "No DB::sub routine defined");
2751 if (!(CvISXSUB(cv))) {
2752 /* This path taken at least 75% of the time */
2754 register I32 items = SP - MARK;
2755 AV* const padlist = CvPADLIST(cv);
2756 PUSHBLOCK(cx, CXt_SUB, MARK);
2758 cx->blk_sub.retop = PL_op->op_next;
2760 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2761 * that eval'' ops within this sub know the correct lexical space.
2762 * Owing the speed considerations, we choose instead to search for
2763 * the cv using find_runcv() when calling doeval().
2765 if (CvDEPTH(cv) >= 2) {
2766 PERL_STACK_OVERFLOW_CHECK();
2767 pad_push(padlist, CvDEPTH(cv));
2770 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2772 AV* const av = (AV*)PAD_SVl(0);
2774 /* @_ is normally not REAL--this should only ever
2775 * happen when DB::sub() calls things that modify @_ */
2780 cx->blk_sub.savearray = GvAV(PL_defgv);
2781 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
2782 CX_CURPAD_SAVE(cx->blk_sub);
2783 cx->blk_sub.argarray = av;
2786 if (items > AvMAX(av) + 1) {
2787 SV **ary = AvALLOC(av);
2788 if (AvARRAY(av) != ary) {
2789 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2792 if (items > AvMAX(av) + 1) {
2793 AvMAX(av) = items - 1;
2794 Renew(ary,items,SV*);
2799 Copy(MARK,AvARRAY(av),items,SV*);
2800 AvFILLp(av) = items - 1;
2808 /* warning must come *after* we fully set up the context
2809 * stuff so that __WARN__ handlers can safely dounwind()
2812 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2813 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2814 sub_crush_depth(cv);
2816 DEBUG_S(PerlIO_printf(Perl_debug_log,
2817 "%p entersub returning %p\n", (void*)thr, (void*)CvSTART(cv)));
2819 RETURNOP(CvSTART(cv));
2822 I32 markix = TOPMARK;
2827 /* Need to copy @_ to stack. Alternative may be to
2828 * switch stack to @_, and copy return values
2829 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2830 AV * const av = GvAV(PL_defgv);
2831 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2834 /* Mark is at the end of the stack. */
2836 Copy(AvARRAY(av), SP + 1, items, SV*);
2841 /* We assume first XSUB in &DB::sub is the called one. */
2843 SAVEVPTR(PL_curcop);
2844 PL_curcop = PL_curcopdb;
2847 /* Do we need to open block here? XXXX */
2848 if (CvXSUB(cv)) /* XXX this is supposed to be true */
2849 (void)(*CvXSUB(cv))(aTHX_ cv);
2851 /* Enforce some sanity in scalar context. */
2852 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2853 if (markix > PL_stack_sp - PL_stack_base)
2854 *(PL_stack_base + markix) = &PL_sv_undef;
2856 *(PL_stack_base + markix) = *PL_stack_sp;
2857 PL_stack_sp = PL_stack_base + markix;
2865 Perl_sub_crush_depth(pTHX_ CV *cv)
2868 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
2870 SV* const tmpstr = sv_newmortal();
2871 gv_efullname3(tmpstr, CvGV(cv), NULL);
2872 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
2881 SV* const elemsv = POPs;
2882 IV elem = SvIV(elemsv);
2883 AV* const av = (AV*)POPs;
2884 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2885 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
2888 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
2889 Perl_warner(aTHX_ packWARN(WARN_MISC),
2890 "Use of reference \"%"SVf"\" as array index",
2893 elem -= CopARYBASE_get(PL_curcop);
2894 if (SvTYPE(av) != SVt_PVAV)
2896 svp = av_fetch(av, elem, lval && !defer);
2898 #ifdef PERL_MALLOC_WRAP
2899 if (SvUOK(elemsv)) {
2900 const UV uv = SvUV(elemsv);
2901 elem = uv > IV_MAX ? IV_MAX : uv;
2903 else if (SvNOK(elemsv))
2904 elem = (IV)SvNV(elemsv);
2906 static const char oom_array_extend[] =
2907 "Out of memory during array extend"; /* Duplicated in av.c */
2908 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
2911 if (!svp || *svp == &PL_sv_undef) {
2914 DIE(aTHX_ PL_no_aelem, elem);
2915 lv = sv_newmortal();
2916 sv_upgrade(lv, SVt_PVLV);
2918 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
2919 LvTARG(lv) = SvREFCNT_inc_simple(av);
2920 LvTARGOFF(lv) = elem;
2925 if (PL_op->op_private & OPpLVAL_INTRO)
2926 save_aelem(av, elem, svp);
2927 else if (PL_op->op_private & OPpDEREF)
2928 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
2930 sv = (svp ? *svp : &PL_sv_undef);
2931 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2932 sv = sv_mortalcopy(sv);
2938 Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
2943 Perl_croak(aTHX_ PL_no_modify);
2944 prepare_SV_for_RV(sv);
2947 SvRV_set(sv, newSV(0));
2950 SvRV_set(sv, (SV*)newAV());
2953 SvRV_set(sv, (SV*)newHV());
2964 SV* const sv = TOPs;
2967 SV* const rsv = SvRV(sv);
2968 if (SvTYPE(rsv) == SVt_PVCV) {
2974 SETs(method_common(sv, NULL));
2981 SV* const sv = cSVOP_sv;
2982 U32 hash = SvSHARED_HASH(sv);
2984 XPUSHs(method_common(sv, &hash));
2989 S_method_common(pTHX_ SV* meth, U32* hashp)
2996 const char* packname = NULL;
2999 const char * const name = SvPV_const(meth, namelen);
3000 SV * const sv = *(PL_stack_base + TOPMARK + 1);
3003 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3011 /* this isn't a reference */
3012 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
3013 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
3015 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
3022 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
3023 !(ob=(SV*)GvIO(iogv)))
3025 /* this isn't the name of a filehandle either */
3027 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
3028 ? !isIDFIRST_utf8((U8*)packname)
3029 : !isIDFIRST(*packname)
3032 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3033 SvOK(sv) ? "without a package or object reference"
3034 : "on an undefined value");
3036 /* assume it's a package name */
3037 stash = gv_stashpvn(packname, packlen, 0);
3041 SV* const ref = newSViv(PTR2IV(stash));
3042 (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
3046 /* it _is_ a filehandle name -- replace with a reference */
3047 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
3050 /* if we got here, ob should be a reference or a glob */
3051 if (!ob || !(SvOBJECT(ob)
3052 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3055 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
3056 (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" :
3060 stash = SvSTASH(ob);
3063 /* NOTE: stash may be null, hope hv_fetch_ent and
3064 gv_fetchmethod can cope (it seems they can) */
3066 /* shortcut for simple names */
3068 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
3070 gv = (GV*)HeVAL(he);
3071 if (isGV(gv) && GvCV(gv) &&
3072 (!GvCVGEN(gv) || GvCVGEN(gv)
3073 == (PL_sub_generation + HvMROMETA(stash)->cache_gen)))
3074 return (SV*)GvCV(gv);
3078 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
3081 /* This code tries to figure out just what went wrong with
3082 gv_fetchmethod. It therefore needs to duplicate a lot of
3083 the internals of that function. We can't move it inside
3084 Perl_gv_fetchmethod_autoload(), however, since that would
3085 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3088 const char* leaf = name;
3089 const char* sep = NULL;
3092 for (p = name; *p; p++) {
3094 sep = p, leaf = p + 1;
3095 else if (*p == ':' && *(p + 1) == ':')
3096 sep = p, leaf = p + 2;
3098 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
3099 /* the method name is unqualified or starts with SUPER:: */
3100 #ifndef USE_ITHREADS
3102 stash = CopSTASH(PL_curcop);
3104 bool need_strlen = 1;
3106 packname = CopSTASHPV(PL_curcop);
3111 HEK * const packhek = HvNAME_HEK(stash);
3113 packname = HEK_KEY(packhek);
3114 packlen = HEK_LEN(packhek);
3126 "Can't use anonymous symbol table for method lookup");
3130 packlen = strlen(packname);
3135 /* the method name is qualified */
3137 packlen = sep - name;
3140 /* we're relying on gv_fetchmethod not autovivifying the stash */
3141 if (gv_stashpvn(packname, packlen, 0)) {
3143 "Can't locate object method \"%s\" via package \"%.*s\"",
3144 leaf, (int)packlen, packname);
3148 "Can't locate object method \"%s\" via package \"%.*s\""
3149 " (perhaps you forgot to load \"%.*s\"?)",
3150 leaf, (int)packlen, packname, (int)packlen, packname);
3153 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
3158 * c-indentation-style: bsd
3160 * indent-tabs-mode: t
3163 * ex: set ts=8 sts=4 sw=4 noet: